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自组装ZnO纳米线网络的增强热电特性,这些网络被封装在非导电聚合物中

Margarita Volkova¹, Raitis Sondors¹, Lasma Bugovecka¹

¹Institute of Chemical Physics, University of Latvia, Raina Blvd 19, Riga, 1586, Latvia.

Scientific reports

|November 29, 2023

概括

在聚合物中封装氧化 (ZnO) 纳米线网络显著提高了它们的热电性能. 这种增强使得它们在灵活的热电应用中非常有前途.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
固态物理固态物理

背景情况:

热电材料将热量转化为电力.
灵活的热电设备需要稳定,高效的材料.
氧化 (ZnO) 纳米线为热电应用提供了潜力.

研究的目的:

为了研究ZnO纳米线网络的热电特性.
评估聚合物封装对这些特性的影响.
评估封装ZnO对于柔性热电器件的适用性.

主要方法:

合成自组装ZnO纳米线网络使用两步过程 (热蒸发和氧化).
在聚乙烯醇 (PVA) 和环氧粘合剂中封装ZnO网络.
在封装前后测量电阻,Seebeck系数,功率系数 (PF) 和功率图 (ZT).

主要成果:

封装显著增加了电导率和Seebeck系数.
热电功率因子提高了约5倍 (PVA) 和约185倍 (环氧).
在室温下达到0.85μW m−1 K−2和ZT ~3x10−6的PF,超过现有的柔性薄膜.
在100个曲周期中表现出极好的稳定性.

结论:

聚合物封装显著增强ZnO纳米线网络的热电特性.
封装ZnO纳米线可用于灵活的热电应用.
该研究提供了通过封装改善热电性能的机制的见解.

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